linux-kernel - [syzbot] WARNING in bh_lru

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Message-ID: <000000000000e0d9a705edbc6497@google.com>
Date:   Fri, 18 Nov 2022 02:44:45 -0800
From:   syzbot <syzbot+f275cebe321308c38cc1@...kaller.appspotmail.com>
To:     jack@...e.com, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: [syzbot] WARNING in bh_lru_install

Hello,

syzbot found the following issue on:

HEAD commit:    9500fc6e9e60 Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=152c606e880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b25c9f218686dd5e
dashboard link: https://syzkaller.appspot.com/bug?extid=f275cebe321308c38cc1
compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1363e60652f7/disk-9500fc6e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/fcc4da811bb6/vmlinux-9500fc6e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0b554298f1fa/Image-9500fc6e.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f275cebe321308c38cc1@...kaller.appspotmail.com

------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 10338 at fs/buffer.c:1145 __brelse fs/buffer.c:1145 [inline]
WARNING: CPU: 0 PID: 10338 at fs/buffer.c:1145 brelse include/linux/buffer_head.h:326 [inline]
WARNING: CPU: 0 PID: 10338 at fs/buffer.c:1145 bh_lru_install+0x2cc/0x320 fs/buffer.c:1259
Modules linked in:
CPU: 0 PID: 10338 Comm: syz-executor.2 Not tainted 6.1.0-rc5-syzkaller-32269-g9500fc6e9e60 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __brelse fs/buffer.c:1145 [inline]
pc : brelse include/linux/buffer_head.h:326 [inline]
pc : bh_lru_install+0x2cc/0x320 fs/buffer.c:1259
lr : __brelse fs/buffer.c:1145 [inline]
lr : brelse include/linux/buffer_head.h:326 [inline]
lr : bh_lru_install+0x2cc/0x320 fs/buffer.c:1259
sp : ffff800013ab3710
x29: ffff800013ab3710 x28: 0000000000000138 x27: 0000000000000002
x26: 0000000000000002 x25: 00000000000000fe x24: 0000000000000003
x23: ffff000119749d20 x22: 00000000000007f0 x21: 0000000000000008
x20: ffff0001197c2690 x19: 0000000000000000 x18: 00000000000003ef
x17: ffff80000c0ed83c x16: ffff80000dc18158 x15: ffff00012b181a40
x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000
x11: 000000000001385f x10: ffff800017409000 x9 : fa1ee85d90993c00
x8 : fa1ee85d90993c00 x7 : ffff800008165f54 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000006 x1 : 0000000100000000 x0 : 0000000000000027
Call trace:
 __brelse fs/buffer.c:1145 [inline]
 brelse include/linux/buffer_head.h:326 [inline]
 bh_lru_install+0x2cc/0x320 fs/buffer.c:1259
 __find_get_block fs/buffer.c:1309 [inline]
 __getblk_slow fs/buffer.c:1034 [inline]
 __getblk_gfp+0x1b4/0x21c fs/buffer.c:1333
 __bread_gfp+0x3c/0x90 fs/buffer.c:1367
 udf_read_tagged+0x7c/0x2e0 fs/udf/misc.c:219
 udf_load_sparable_map fs/udf/super.c:1359 [inline]
 udf_load_logicalvol+0x4ac/0xb70 fs/udf/super.c:1450
 udf_process_sequence+0x3b8/0x518 fs/udf/super.c:1766
 udf_load_sequence fs/udf/super.c:1813 [inline]
 udf_check_anchor_block+0xf8/0x1e8 fs/udf/super.c:1852
 udf_scan_anchors+0xb0/0x300 fs/udf/super.c:1885
 udf_find_anchor+0x4c/0x1d4 fs/udf/super.c:1941
 udf_load_vrs+0x88/0x240 fs/udf/super.c:2006
 udf_fill_super+0x29c/0x858 fs/udf/super.c:2184
 mount_bdev+0x1b8/0x210 fs/super.c:1401
 udf_mount+0x44/0x58 fs/udf/super.c:122
 legacy_get_tree+0x30/0x74 fs/fs_context.c:610
 vfs_get_tree+0x40/0x140 fs/super.c:1531
 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040
 path_mount+0x358/0x890 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
irq event stamp: 1278
hardirqs last  enabled at (1277): [<ffff800008165fe4>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1366 [inline]
hardirqs last  enabled at (1277): [<ffff800008165fe4>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4950
hardirqs last disabled at (1278): [<ffff80000c0a4f34>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (1254): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (1249): [<ffff800008017c88>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
---[ end trace 0000000000000000 ]---


---
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